Brushing apparatus

ABSTRACT

A brushing apparatus for carpets and the like has a housing one side of which faces a surface to be brushed and is provided with a plurality of wall portions connected with one another by weakened hinge-like zones so that these wall portions are provided in flat condition and can then be displaced relative to one another to a condition in which they define a trough. A brush extends along the trough and, when rotated in response to movement of the brushing apparatus over the surface, picks up dirt and deposits it in the trough.

United States Patent 191 Leifheit v t June 11, 1974 BRUSHING APPARATUS 2,975,449 3/1961 Liddell ct a] 15/41 R 1 Inventor Gunter Lethe, Lam, 3222'233 Z133; 321225.75;:jjjiiiii:iiiijiijiijiiijii: 12??? Germany [73] Assignee: Leiiheit International Guenter Primary Examiner-Edward L. Roberts Leifhelt KG, Nassau, Lahn, Attorney, Agent, or Firm-Michael S. Striker Germany [22] Filed: 061. 31, 1972 ABTRACT Appl. No.: 302,590

Foreign Application Priority Data A brushing apparatus for carpets and the like has a housing one side of which faces a surface to be [30] brushed and is provided with a plurality of wall por- Nov 5 197 Germany 2l 54971 tions connected with one another by weakened hingelike zones so that these wall portions are provided in 52 us. Cl. 15/42 fiat condition and can be displaced relative to [51] Int. Cl'. .A47l 11/08 another a condition in which they define a [58] Field of Search 15/4148 trough. A brush extends along the trough and, when rotated in response to movement of the brushing ap- [56] References Cited paratusover the surface, picks up dirt and deposits it UNITED STATES PATENTS the trough 2,745,125 /1956 Klumb /41 R g 10 Claims, 5 Drawing Figures PATENTEDJUN I 1 I974 3815367 SHEET EU! 3 BRUSHING APPARATUS BACKGROUND OF THE INVENTION The present invention relates to a brushing apparatus, and more particularly to a brushing apparatus for carpets and the like.

Brushing apparatus of this type here in question, that is so-called sweepers, is already known. Such devices have housings from the underside of which one or more rotary brushes extend so that they will contact the carpet as the sweeper is moved over the same, to pick up dirt from the carpet. Of course, the dirt must be deposited somewhere once it has been picked up; consequently, the known sweepers have in their housing one or more troughs or receptacles into which the dirt is deposited by the rotating brushes.

The difficulty with these prior-art devices is that the receptacles are in front of one piece with the housing so that the housing as produced already has the dirtcollectingtroughs formed on it and located in the position which they are to assume in the finished device. To

produce a housing of this type is, however, relatively difficult, especially if it is made of synthetic material, because this requires complicated molds. This is particularly true if the configuration of the troughs is desired to be such that they can afford optimum dirt-collecting and storage possibilities due to their shape.

Evidently, the more complicated the molds required for the production of the housing, the more expensive they will be and,in' the final analysis, the more expensive the housing will be. Aside from this, however, there is the further disadvantage that the more complicated the housing, the greater will be the rate of rejections of finished housings, due to the occurrence of faults in the housing during production thereof.

SUMMARY OF THE INVENTION Accordingly, it is a general object of the present invention to avoid these disadvantages.

More particularly, it is an object of the present invention to provide a brushing apparatus of the type under discussion, in which these disadvantages 'are avoided.

Still more particularly, it is an object of the present invention to provide such a brushing apparatus which has a housing in which the portions constituting the dirt-collecting trough or troughs can be produced in an inexpensive manner with the simplest molds and with the largest possible elimination of fault developments.

In keeping with these objects, and others which will become apparent hereafter, one feature of the invention resides in a brushing apparatus, particularly for carpets and the like, which includes a combination of a housing having a side facing a surface to be brushed and provided with a plurality of wall portions which are connected by flexible wall zones so as to be displaceable from an initially flat condition to an operative condition in which the wall portions constitute the bottom wall and at least one of the transverse and longitudinal walls of a dirt-collecting trough. Retaining portions are provided for retaining the wall portions in operative condition, and at least one brush is joumaled in the housing laterally adjacent the trough and projecting in part from the side facing the surface to be brushed, for contactwith this surface.

constructed, the brushing apparatus according to the present invention, and especially the housing thereof, can be produced very inexpensively and very simply, and the wall portions can be readily moved from their initially flat position to their operative position in which they define the trough. Moreover, especially the fact that the wall portion which, in the operative condition, will be the longitudinal wall portion of the trough which extends along the brush roller, is formed in flat condition with the other wall portions constitutes a significant advantage, because this greatly reduces the difficulties of producing these wall portions and of the molds required for such production, especially in view of the fact that this particular longitudinal wall portion must be inclined at an angle to the bottom wall portion of the trough in order to provide for optimum dirt-introducing results.

It is particularly advantageous if the flexible wall zones are so-called integral hinges, that is'portions of the material from which the wall portions themselves are produced, which have a substantially lesser thickness than the wall portions and can readily flex. In the region of these. wall zones there will be provided the retaining portions in the form of noses or other abutments, which engage on another when the wall portions have been displaced to operative condition. Thus, the displacing to operative condition can be effected without special tools and an automatic relative location of the various wall portions in the desired final position willbe obtained, because the positions will have been reached when the respective noses abut one another.

It is already known to arrange such dirt-collecting troughs pivotable between a dirt-collecting and a dirtdischarging position. This can be accomplished in the construction according to the present invention also, for which purpose the trough can be joumaled on a shaft located in the housing, and the longitudinal trough wall which extends along the brush roller can advantageously extend with a portion of it behind the shaft so as to be held in position by the same. Thus, even if the thickness of this wall is relatively small, it is nevertheless very stable in its operating condition because it is supported by engagement with the shaft over its entire length. The height of this particular wall portion is advantageously accommodated to the distance between the pivot axis defined by the shaft and the wall zone connecting this particular longitudinal wall with the bottom wall portion. The edge of the longitudinal wall may be provided'with a recess in which the shaft 1 may in part be accommodated.

The transverse walls are provided at their free edges preferably with groove-like recesses for the legs of a biasing spring which serves to maintain the pivotably arranged wall portions in their normal position, without further preventing pivoting to dirt-discharging position. By having the legs of the springs engaged in the recesses the transverse walls can be retained by the springs after they have been moved to the operative condition in which they form the trough with the longitudinal walls and the bottom wall. Advantageously the bottom of the respective recess is of substantially saddleshaped configuration, and the legs in any pivotable position of the trough will always be properly located in the recess and prevent the transverse walls from moving out of their position. This particular configuration of the saddle-shaped bottom of the recess also assures that a reversal of the direction of the bias exerted on the bottom wall by the spring will take place as the trough is pivoted from the dirt-collecting to the dirtdischarging position, so that the bottom wall will be properly biased in any position of the trough. To prevent a weakening of the transverse wall it is advantageous to form the-recesses in thickened portions of the transverse walls in which at the same time the journals for mounting on the shaft are formed.

The transverse walls may also be provided in the region of the pivot axis with sleeve-like projections which extend into recesses provided in the housing itself, whereby an advantageous increase of the journaling portion is achieved, and whereby further support especially in the end-position of the pivoting movement is obtained.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing.

BRIEF DESCRIPTION THE DRAWING DESCRIPTION OF THE PREFERRED EMBODIMENTS Discussing firstly the embodiments illustrated in FIGS. 1 and 2, it will be seen that FIG. 1 is a bottomplan view of a brushing apparatus or sweeper in accordance with the present invention, such as is used for cleaning carpets, rugs, floor and the like. The housing of the apparatus is designated with reference numeral 10 and journaled in this housing is a brush roller 11 which can be mounted in fixed journals or in journals which can be raised and lowered with respect to the lower open side of the housing 10. Associated with the brush roller 11 are cup-shaped auxiliary brushes 12 whose purpose it is to pick up dirt from the lateral region of the apparatus and to convey it inwardly into the range of pick up of the brush roller 11. Of course, the brushes 12 could be omitted.

Dirt picked up by the brush roller 11, which is driven in known manner by the wheels 13 which are also journaled in the housing 10, is deposited in a trough-like dirt-collecting space of the housing. Transmittal of the movement from the wheels 13 to the brush roller 11 to drive the same, can be either direct or indirect via interposed elements; it does not form a part of the present invention. The auxiliary brushes 12 are also driven by additional wheels 14, and of course the configuration of the apparatus can be different from what has been illustrated without departing from the intive concept which will now be discussed.

The drawing shows clearly, especially in FIG. 1, that in the region at opposite sides of the brush roller 11 the lower side of the housing 10 is closed by bottom units FIG. 2 shows that the units 15 and 16 have transverse walls 18 at the inner side of the housing and in addition have a longitudinalwall 19 which extends along the brush roller 11. Thus, the units 15 and 16 constitute troughs into which the dirt picked up by the brush roller 11 can be deposited, depending upon the direction of rotation of the brush roller either into the unit 15 or into the unit 16.

When the units are in the position shown in FIGS. 1 and 2, dirt picked up by the brush roller is flung over the longitudinal walls 19 into the respective receptacle, and of course the provision of the two units 15 and 16 at opposite sides of the brush roller 11 is intended to assure dirt pick up and deposition, irrespective of the direction in which the brushing apparatus is moved over the surface.

Each of the units 15 and 16 is .journaled on an axel 20 which in the illustrated embodiment also carries the pairs of wheels 13. The axels 20 are mounted in wall portions of the housing 10, and by having the units 15 and 16 mounted on the axels 20 the units can be pivoted from the dirt-receiving illustrated to a dirtdischarging position in which dirt can be removed from them. FIG. 2 shows that the units 15 and 16 engage the front or rear side of the housing, respectively, with portions of the units in such a manner that the outwardly extending portions 21 constitute engaging portions which permit their displacement from dirt-receiving to dirt-discharging position, and visa versa. Springs 22'are provided which engage the transverse walls 18 of the units 15 and 16, biasing the same towards the dirtreceiving position illustrated in FIG. 2. The springs engage housing portions 4; in the illustrated embodiment, a carrier 23 of the main brush roller 11. The legs of the springs each contact the transverse walls of the units 15 and 16. v

The latter units are produced of one piece each, being made in the illustrated embodiment of synthetic plastic material. They may have starting configurations such as is shown in FIGS. 3 and 4, that is they may be produced in the configurations shown in FIGS. 3 and 4. The longitudinal wall portion and/or the transverse wall portion are located in a common plane, or at least substantially in a common plane, being connected by flexible wall zones 24 and 25. In FIG. 3 the longitudinal wall portion and the transverse wall portions are produced in this manner, whereas in FIG. 4 on the longitudinal wall portion is produced in this manner whereas the transverse wall portions are formed in their final position, that is extending partly from the bottom wall portion. Either configuration makes it possible to produce the units 15 and 16 with very simple molds and very inexpensively.

The zones 24 and 25 which separate the bottom wall portion from the longitudinal wall portion and/or the transverse wall portions, connecting it with the same, are constructed as integral hinges, that is as zones having areduced thickness and being thus flexible enough to permit a displacement of the various wall portions relative to one another to the operative position with- J out breaking or cracking. This final position is illustrated in FIG. 5. To maintain the wall portions in their final desired relative position, they are provided with retaining portions which are formed on them during production, and in the illustrated embodiment the longitudinal wall portion 19 is so configurated that when in erected condition it will be high enough to extend behind the pivot axis 20 so that it cannot fold back again. The height of the wall portion 19 is so coordinated with the distance of the associated Zone 24 from the pivot axis or axle 20 that it will engage the latter when in erected condition. In particular, the wall portion 19 is provided with a longitudinal recess 19 configurated so as to at least in part receive the axle 20. The junctions between the elastically yieldable zone 24 and the associated wall portions connected by it are provided with the retaining portions or noses 26 which abut one another in the position of FIG. 5.

The transverse wall portions 18 may also be formed as in FIG. 4, or, if they are formed as in FIG. 3, they may be maintained in their erected position by the springs 22. For this purpose they are then provided with groove-like recesses 27 into which legs of the springs 22 engage to stabilize the position of the transverse wall portions 18. To avoid weakening of the wall portions 18 in the region of the grooves they are provided with an area 18' of greater thickness in which also outwardly extending sleeve-like projections 21 may be formed which extend into journal recesses of the housing.

The recesses 27 for the springs 22 are advantageously provided with a saddle-shaped bottom29 to assure for an even tight engagement of the spring legs both in the dirt-receiving position and in the dirt-discharging position of the units and 16. In conjunction with the arrangement of the rotation of the recesses 27 above the axle this particular configuration of the bottom still has the additional advantage of biasing the units 15 and 16 in their pivoting plane, in such a manner that during pivoting from the dirt-receiving to the dirt-discharging position or back to the same a reversal will occur in the biasing direction, whereby the units 15 and 16 will be maintained in the respective end position (discharging or receiving) by the springs 22.

Evidently, various changes may be made from the illustrated embodiments without departing from the invention. The brushes 12 could be omitted, the outline of the various components could be changed, additional brushes 11 could be provided, a single one of the units 15 and 16 could be provided, and other modifications could be made without departing from the invention.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.

While the invention has been illustrated and described as embodied in a brushing apparatus, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended:

1. In a brushing apparatus, particularly for carpets and the like, a combination comprising a housing having a side facing a surface to be brushed and provided with a plurality of wall portions which are connected by flexible wall zones about which they have been displaced from an initially flat condition to an operative condition in which said wall portions constitute the bottom wall and at least one of the transverse and longituv dinal walls of a dirt-collecting trough; retaining portions for retaining said wall portions in said operative condition; and at least one brush journalled in said housing laterally adjacent said trough and projecting in part from said side for contact with a surface to be brushed.

2. A combination as defined in claim 1, wherein said wall zones are of one piece with the respective wall portions and constitute integral hinges.

3. A combination as defined in claim 2, said retaining portions including abutments in the region of the respective wall portions, which engage one another in abutting relationship when said wall portions are in said operative position.

4. A combination as defined in claim 1, further comprising a shaft mounted in said housing, said troughs being displaceable between a dirt-collecting and a dirtdischarging portion, and one of said wall portions normally abutting said shaft for preventing undesired displacement.

5. A combination as defined in claim 4, said one wall portion being a longitudinal wall of said trough and extending along said brush.

6. A combination as defined in claim 1, said wall por tions including said transverse wall portions, and the latter being provided with recesses accommodating a biasing spring.

7. A combination as defined in claim 6, said recesses having a bottom of substantially saddle-shaped configuration.

8. A combination as defined in claim 6, said transverse walls having thickened portions provided'with said recesses and with journals for pivotally joumalling said trough for movement between a dirt-collecting and a dirt-discharging position.

9. A combination as defined in claim 1, said housing having sidewalls provided with recesses and wherein said wall portions include the transverse walls of said trough; and further comprising projections on outwardly facing sides of said transverse walls and each received in one of said recesses.

10. A combination as defined in claim 1, wherein at least said wall portions and zones are of synthetic plastic material. 

1. In a brushing apparatus, particularly for carpets and the like, a combination comprising a housing having a side facing a surface to be brushed and provided with a plurality of wall portions which are connected by flexible wall zones about which they have been displaced from an initially flat condition to an operative condition in which said wall portions constitute the bottom wall and at least one of the transverse and longitudinal walls of a dirt-collecting trough; retaining portions for retaining said wall portions in said operative condition; and at least one brush journalled in said housing laterally adjacent said trough and projecting in part from said side for contact with a surface to be brushed.
 2. A combination as defined in claim 1, wherein said wall zones are of one piece with the respective wall portions and constitute integral hinges.
 3. A combination as defined in claim 2, said retaining portions including abutments in the region of the respective wall portions, which engage one another in abutting relationship when said wall portions are in said operative position.
 4. A combination as defined in claim 1, further comprising a shaft mounted in said housing, said troughs being displaceable between a dirt-collecting and a dirt-discharging portion, and one of said wall portions normally abutting said shaft for preventing undesired displacement.
 5. A combination as defined in claim 4, said one wall portion being a longitudinal wall of said trough and extending along said brush.
 6. A combination as defined in claim 1, said wall Portions including said transverse wall portions, and the latter being provided with recesses accommodating a biasing spring.
 7. A combination as defined in claim 6, said recesses having a bottom of substantially saddle-shaped configuration.
 8. A combination as defined in claim 6, said transverse walls having thickened portions provided with said recesses and with journals for pivotally journalling said trough for movement between a dirt-collecting and a dirt-discharging position.
 9. A combination as defined in claim 1, said housing having sidewalls provided with recesses and wherein said wall portions include the transverse walls of said trough; and further comprising projections on outwardly facing sides of said transverse walls and each received in one of said recesses.
 10. A combination as defined in claim 1, wherein at least said wall portions and zones are of synthetic plastic material. 